diff --git a/MANIFEST.in b/MANIFEST.in
index 7c6a4d5..55d2b6d 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -22,5 +22,20 @@ recursive-include tests *.py
 include tools/*.cmd
 include tools/*.py
 include tools/*.txt
-prune tools/__*  # local cache folders
 recursive-include tools/suds_devel *.py
+
+# Python 2 versions prior to some early 2.7.x release and Python 3 versions
+# prior to some 3.2.x release had buggy disutils implementations that can
+# result in our project's source distribution containing some extra unwanted
+# files picked up from some of our local cache folders. This is a 3-layer fix
+# to work around the problem:
+#   1. We prune those folders just in case some of their content got added by
+#      mistake.
+#   2. An extra include is here to silence distutils warnings in case the used
+#      distutils implementation is not buggy and therefore no extra files have
+#      been added and distutils can not find anything to prune.
+#   3. To make the include actually include an existing file, setup.py
+#      constructs at least one such file to be included with a buggy distutils
+#      implementation.
+include tools/__*/*
+prune tools/__*
diff --git a/setup.py b/setup.py
index 4866480..18a9825 100644
--- a/setup.py
+++ b/setup.py
@@ -117,7 +117,8 @@ if script_folder != current_folder:
 # Import suds_devel module shared between setup & development scripts.
 # -----------------------------------------------------------------------------
 
-sys.path.insert(0, os.path.join(script_folder, "tools"))
+tools_folder = os.path.join(script_folder, "tools")
+sys.path.insert(0, tools_folder)
 import suds_devel
 sys.path.pop(0)
 
@@ -561,6 +562,36 @@ if sys.version_info >= (3,):
             break;
 
 
+# -----------------------------------------------------------------------------
+# Avoid setup warnings when constructing a list of all project sources.
+# -----------------------------------------------------------------------------
+# Part of this workaround implemented and part in the project's MANIFEST.in
+# template. See a related comment in MANIFEST.in for more detailed information.
+
+dummy_tools_folder = os.path.join(tools_folder, "__dummy__")
+dummy_tools_file = os.path.join(dummy_tools_folder, "readme.txt")
+try:
+    if not os.path.isdir(dummy_tools_folder):
+        os.mkdir(dummy_tools_folder)
+    if not os.path.isfile(dummy_tools_file):
+        f = open(dummy_tools_file, "w")
+        try:
+            f.write("""\
+Dummy empty folder added as a part of a patch to silence setup.py warnings when
+determining which files belong to the project. See a related comment in the
+project's MANIFEST.in template for more detailed information.
+
+Both the folder and this file have been generated by the project's setup.py
+script and should not be placed under version control.
+""")
+        finally:
+            f.close()
+except EnvironmentError:
+    # Something went wrong attempting to construct the dummy file. Ah well, we
+    # gave it our best. Continue on with possible spurious warnings.
+    pass
+
+
 # -----------------------------------------------------------------------------
 # Set up project metadata and run the actual setup.
 # -----------------------------------------------------------------------------